Staying Strong with Stress Durable Automotive Adhesives!

    March 2, 2016

Following the right fitness program for you can provide endless benefits, including increased strength. Similarly, for a vehicle to perform at its peak, it must have the right custom solutions for optimal strength.

As OEMs move toward integrating lightweight technology into automobiles to improve fuel efficiency, new materials are being introduced that require alternative joining techniques. Adhesives are the primary method of joining dissimilar materials that can’t be effectively joined using traditional spot welding techniques. When you weld or mechanically fasten, you are creating a stress at the joining point. With adhesives, however, transmission loads are distributed throughout a greater area, which allows the structure to work more efficiently and reduce fatigue issues.

Tackling Vehicle Fatigue

Vehicle fatigue is a serious concern since it can impact structural integrity. To avoid fatigue loading issues, engineers must be able to predict mechanical behavior of the adhesively bonded joints under the intended application and expected operating conditions.

One method is through Finite Element Analysis (FEA), a computer model that takes into account different variables to predict stress areas. Based on the output, adhesives can be added to joint locations that are identified to spread stress loads. Strong joints are needed for every model, from a pickup truck (which typically endures more fatigue with carrying heavier loads) to smaller cars.

As a leader in adhesives, Henkel has developed several toughened, crash resistant structural adhesives for bonding lighter, dissimilar materials:  

  • TEROSON EP 5089 – highly toughened structural adhesive, that performs across wide temperature ranges

  • TEROSON EP 5100 – stress durable structural adhesive designed for aluminum intensive body structures

These technologies provide the following benefits: ·          

  • Improved stiffness and performance under impact and fatigue loading in body-in-white applications.

  • Enables multi-metal design and flexibility in structure lightweighting due to ability to bond dissimilar substrates.

  • Stress distribution may allow for the down gauge of metals.

  • Ability to join high strength materials that are frequently sensitive to stress concentration.

To learn more about Fatigue Behavior of adhesively bonded joints, view the white paper on our Smart Chemistry Hub.

About the Author, Mike Pogarch

Mike Pogarch is the Business Development Manager – Acoustic and Structural Steering Unit for the automotive group at Henkel. Pogarch interacts with Global Automakers and Auto Suppliers to promote structural solutions that enhance vehicle ride quality, vehicle durability and vehicle safety. He has over 30 years of experience in automotive structural adhesives and sealing solutions, advancing material design, application and performance into multi-material vehicle body structures. Pogarch earned a Bachelor of Business Administration degree in Business Management with a Business Law Minor from Western Michigan University.

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